This is my website domain link : https://belleinity.com/
In the store i hava a page with url : https://belleinity.com/pages/funnel
i wants to assign free.belleinity.com to this link
means if someone enter free.belleinity.com then the user go to https://belleinity.com/pages/funnel but still sees the address as free.belleinity.com
Means after entering free.belleinity.com the users sees the content of https://belleinity.com/pages/funnel while in the address bar it shows free.belleinity.com